Axolotls are aquatic animals that can regrow limbs, organs, and even parts of their brain.
The newest axolotl at the Brookfield Zoo arrived this spring after being rescued at O'Hare Airport by U.S. Fish and Wildlife officers.
Now he needs a name.
The options are: Bubblegum, Mochi, Poseidon and Sir Mix-A-Lotl.
You can vote for your choice on Brookfield Zoo's Facebook page.